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Compact switchable balun 1:1 - 4:1
I have been experimenting with an off center fed dipole for for field operation, and the antenna called for a 4:1
post 14 Nov 2024
Toroid & balun Links →
Balun un-un
Il diametro di ogni singolo conduttore rosso o nero e' di 2 mm plastica compresa, e di 0.75 mm senza isolante plastico
Balun
For some so-called baluns, no throttling action or effect against common-mode currents will be measurable. This means that sheath waves occur and the coaxial cable outer screen acts as an antenna. Domestic interference fields penetrate unhindered over the alleged balun in the receiver
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Enter the frequency of operation and the balanced and unbalanced Z0.Values for L and C will be calculated
Popular high power baluns
Transformers, Inductors, Chokes and Coils custom designs, standard stocking parts
Balun 4:1 in aria
Varie fasi della costruzione di un balun in aria 1:4 per alimentare una antenna long wire tipo canna da pesca o simili
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Il diametro di ogni singolo conduttore rosso o nero e' di 2 mm plastica compresa, e di 0.75 mm senza isolante plastico
For some so-called baluns, no throttling action or effect against common-mode currents will be measurable. This means that sheath waves occur and the coaxial cable outer screen acts as an antenna. Domestic interference fields penetrate unhindered over the alleged balun in the receiver
Enter the frequency of operation and the balanced and unbalanced Z0.Values for L and C will be calculated
Transformers, Inductors, Chokes and Coils custom designs, standard stocking parts
Varie fasi della costruzione di un balun in aria 1:4 per alimentare una antenna long wire tipo canna da pesca o simili
23cm Yagi Antenna building Finished antenna at 1275 MHz SWR under 1:1.5 at resonant frequency
50 MHz preamp Gain 26dB with the BFG135 Preamps for 144 and 430 MHz, for 50 MHz, the BFG135a is a cheap transistor and in my view rather strong. It is not easily damaged by static discharge or RF power. FG connection
Interface-for-digital-broadcasts-with-integrated-audio 4-port HUB, with a TUSB2046. With port 1 of the HUB we drive the FT232RL; with port 2 the PCM2904, furthermore, we decided to leave ports 3 and 4 free